// Copyright Pacificao. All Rights Reserved.

#include "AgrarianDemoNoticeWidget.h"

#include "Rendering/DrawElements.h"
#include "Styling/CoreStyle.h"

int32 UAgrarianDemoNoticeWidget::NativePaint(
	const FPaintArgs& Args,
	const FGeometry& AllottedGeometry,
	const FSlateRect& MyCullingRect,
	FSlateWindowElementList& OutDrawElements,
	int32 LayerId,
	const FWidgetStyle& InWidgetStyle,
	bool bParentEnabled) const
{
	LayerId = Super::NativePaint(Args, AllottedGeometry, MyCullingRect, OutDrawElements, LayerId, InWidgetStyle, bParentEnabled);

	const FVector2D Size = AllottedGeometry.GetLocalSize();
	const float PanelWidth = FMath::Min(860.0f, Size.X - 96.0f);
	const float PanelHeight = 210.0f;
	const FVector2D PanelPosition((Size.X - PanelWidth) * 0.5f, 42.0f);

	FSlateDrawElement::MakeBox(
		OutDrawElements,
		++LayerId,
		AllottedGeometry.ToPaintGeometry(FVector2f(PanelWidth, PanelHeight), FSlateLayoutTransform(FVector2f(PanelPosition))),
		FCoreStyle::Get().GetBrush(TEXT("WhiteBrush")),
		ESlateDrawEffect::None,
		FLinearColor(0.02f, 0.03f, 0.025f, 0.82f));

	FSlateDrawElement::MakeBox(
		OutDrawElements,
		++LayerId,
		AllottedGeometry.ToPaintGeometry(FVector2f(PanelWidth, 3.0f), FSlateLayoutTransform(FVector2f(PanelPosition))),
		FCoreStyle::Get().GetBrush(TEXT("WhiteBrush")),
		ESlateDrawEffect::None,
		FLinearColor(0.45f, 0.72f, 0.40f, 1.0f));

	const FSlateFontInfo MottoFont = FCoreStyle::GetDefaultFontStyle("Bold", 30);
	const FSlateFontInfo VersionFont = FCoreStyle::GetDefaultFontStyle("Regular", 18);
	const FSlateFontInfo NoticeFont = FCoreStyle::GetDefaultFontStyle("Regular", 16);

	DrawCenteredText(OutDrawElements, LayerId, AllottedGeometry, Motto, PanelPosition.Y + 34.0f, MottoFont, FLinearColor(0.86f, 0.94f, 0.78f, 1.0f));
	DrawCenteredText(OutDrawElements, LayerId, AllottedGeometry, VersionLabel, PanelPosition.Y + 94.0f, VersionFont, FLinearColor(0.82f, 0.86f, 0.78f, 1.0f));
	DrawCenteredText(OutDrawElements, LayerId, AllottedGeometry, DemoNotice, PanelPosition.Y + 126.0f, NoticeFont, FLinearColor(0.78f, 0.82f, 0.75f, 1.0f));
	DrawCenteredText(OutDrawElements, LayerId, AllottedGeometry, CopyrightNotice, PanelPosition.Y + 158.0f, NoticeFont, FLinearColor(0.66f, 0.70f, 0.64f, 1.0f));

	return LayerId;
}

void UAgrarianDemoNoticeWidget::DrawCenteredText(
	FSlateWindowElementList& OutDrawElements,
	int32& LayerId,
	const FGeometry& AllottedGeometry,
	const FText& Text,
	float Y,
	const FSlateFontInfo& Font,
	const FLinearColor& Color) const
{
	const FVector2D Size = AllottedGeometry.GetLocalSize();
	const FString TextString = Text.ToString();
	const float EstimatedWidth = FMath::Min(Size.X - 96.0f, static_cast<float>(TextString.Len()) * Font.Size * 0.52f);
	const FVector2D TextPosition((Size.X - EstimatedWidth) * 0.5f, Y);

	FSlateDrawElement::MakeText(
		OutDrawElements,
		++LayerId,
		AllottedGeometry.ToPaintGeometry(FVector2f(EstimatedWidth, Font.Size + 12.0f), FSlateLayoutTransform(FVector2f(TextPosition))),
		Text,
		Font,
		ESlateDrawEffect::None,
		Color);
}